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howto:fix_self_corrupt_mysql [2016/07/28 17:28] bram |
howto:fix_self_corrupt_mysql [2016/08/09 16:24] bram |
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| In some situations (typically power failure), MySQL corrupts its own database (called "mysql") and won't start again. This breaks any application using MySQL. | In some situations (typically power failure), MySQL corrupts its own database (called "mysql") and won't start again. This breaks any application using MySQL. | ||
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| + | **You can try this script by Bram that should normally auto-fix this issue but need more testing (and we are looking for testing) https://github.com/labriqueinternet/auto-fix-mysql Plz contact us if you intent to do so** | ||
| Here is a way to restore MySQL in this situation. I've never managed to prevent that, but [[howto:daily_backup|backing up this DB]] would likely allow simpler restorations. | Here is a way to restore MySQL in this situation. I've never managed to prevent that, but [[howto:daily_backup|backing up this DB]] would likely allow simpler restorations. | ||
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| # let's backup things | # let's backup things | ||
| cd .. | cd .. | ||
| - | cp -rv mysql mysql.backup | + | cp -rv mysql ../mysql.backup |
| cd mysql | cd mysql | ||
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| # and to recreate agendav user | # and to recreate agendav user | ||
| - | insert into user values('localhost','agendav', PASSWORD('put the password here'),'N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','','','','',0,0,0,0,NULL,'','N','N'); | + | insert into user values('localhost','agendav', PASSWORD('put the password here'),'N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','','','','',0,0,0,0,'','','N','N'); |
| GRANT ALL PRIVILEGES ON agendav.* TO 'agendav'@localhost; | GRANT ALL PRIVILEGES ON agendav.* TO 'agendav'@localhost; | ||
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| # you can try a bash script like that: | # you can try a bash script like that: | ||
| # BUT I HAVEN'T TESTED IT | # BUT I HAVEN'T TESTED IT | ||
| - | for i in app1 app2 app3; do mysql -p$(cat /etc/yunohost/mysql) mysql -e "insert into user values('localhost','$i', PASSWORD('$(yunohost app setting $i mysqlpwd)'),'N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','','','','',0,0,0,0,NULL,'','N','N'); GRANT ALL PRIVILEGES ON $i.* TO '$i'@localhost;"; done; mysql -p$(cat /etc/yunohost/mysql) mysql -e "FLUSH PRIVILEGES;" | + | for i in app1 app2 app3; do mysql -p$(cat /etc/yunohost/mysql) mysql -e "insert into user values('localhost','$i', PASSWORD('$(yunohost app setting $i mysqlpwd)'),'N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','','','','',0,0,0,0,'','','N','N'); GRANT ALL PRIVILEGES ON $i.* TO '$i'@localhost;"; done; mysql -p$(cat /etc/yunohost/mysql) mysql -e "FLUSH PRIVILEGES;" |